Angular is our framework of choice for a number of reasons. Business data is almost always displayed in a grid format. It makes sense to start with a strong widget that is powerful and fast when building applications. Ignite UI provides a complete toolset of widgets for other frameworks, but Angular is our focus. Ignite UI is helping us deliver a great UX/UI.
It's great to develop business applications. Previously, we tried different technologies but we find it the most suitable for us. We also deploy a generic backend so we don't need to install anything new to implement new applications. This helps us to develop very fast and with very low effort.
We tried DevExpress when we started a project a couple of years ago. At the time, the documentation and ease of use went to Infragistics. When trying new or updated tools, the documentation and samples are everything. Having minimal documentation or documentation that seems to be written for people that already know how to use the product is just plain frustrating. Samples need to be something close to the real-life usage of the product.
Each of the above platforms offer a specific solution. Sencha provides a complete solution that is a library of components as well as a framework to modularize your application so that it's better manageable. Once you get over the learning curve of the whole technology it's a breeze to implement new functionality within the application. We have an aggressive client who comes to us every other day with some new requirement, and sencha has been able to answer all of those without issues.